Haier 1U25S2SQ1FA [28/54] Outdoor unit troubleshooting
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Haier 1U25S2SQ1FA [28/54] Outdoor unit troubleshooting

Haier 1U50S2SJ2FA [28/54] Outdoor unit troubleshooting
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Outdoor Unit Troubleshooting CAUTION THIS UNIT WILL BE STARTED INSTANTLY WITHOUT ON OPERATION WHEN ELECTRIC POWER IS SUPPLIED BE SURE TO EXECUTE OFF OPERATION BEFORE ELECTRIC POWER IS DISCONNECTED FOR SERVICING This unit has a function of automatic restart system after recovering power stoppage 1 Before starting test run for all Heat pump models Confirm whether the power source breaker main switch of the unit has been turned on for over 12 hrs to energize the crankcase heater in advance of operation 2 Test run Run the unit continuously for about 30 minutes and check the following Suction pressure at check joint of service valve for gas pipe Discharge pressure at check joint on the compressor discharge pipe Temperature difference between return air and supply air for indoor unit Flash times of LED on mainboard Trouble description 1 Eeprom failure 2 IPM failure Communication error between main board and spdu module SPDU Communication error High pressure protection 4 5 8 Analyze and diagnose Outdoor main board eeprom fail IPM failure Communication fail over 4min System high pressure over 4 3 Mpa Compressor discharging temperature protection Compressor discharging temperature over HO centigrade Abnormal of DC moter Jam of DC motor or motor failure 10 Abnormal of piping sensor Piping sensor short circuit or open circuit 11 Suction temperature sensor failure When the The wiring of compressor is wrong or the connection is poor 12 Abnormal of outdoor ambient sensor Outdoor ambient sensor short circuit or open circuit 13 Abnormal of compressor discharge sensor Compressor discharge sensor short circuit or open circuit 15 Communication error between indoor and outdoor unit Communication fail over 4min 16 Lack of refrigerant Check if there is leakage in the unit 17 4 way valve reverse failure Alarm and stop if detect Tm 15 last for 1min after compressor has started for 10min in heating mode confirm the failure if it appears 3 times in one hour 18 Compressor jam only for spdu Inner compressor is abnormal jamed 19 Module PWM select circuit error Module PWM select wrong circuit 25 Compressor U phase over current The current of compressor U phase is too high 25 Compressor V phase over current The current of compressor V phase is too high 25 Compressor W phase over current The current of compressor W phase is too high 9 er Road Hi tech Zone Qingdao 266101 P R China Contacts 86 532 8893 6943 FAX 86 532 8893 1010 Website haier com 25

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